I think because they're shooting for versatility a bit more. Ironically though, a pbass doesn't need to be versatile--it sounds great in pretty much any setting (so, well then I guess it IS actually quite versatile!)Its the PU...reckon u could stick it on a dead fish and it would still sound good (the fish that is).
But....I'd still love someone to explain why you hardly ever see modern house players, jazz fusion guys, Gospel players, cruise ship guys and pit guys playing them....everywhere I look its all boutique fivers or at the very least the Jazz bass.